Here's an article by Hiroshi Ikeda sensei on Bu Jin Design's website that talks about his thoughts on the two:

Interesting article, thanks for posting it. I'm going to have to figure out how to do that ikkyo to shihonage henkawaza sometime. My question is that when referring to ouyouwaza, does Ikeda S. mean doing whatever is necessary to execute a given technique, ie, the one demonstrated, or rather doing any technique neccesary to throw a particular uke. In many Federation dojos, the first one is expected and the second is often frowned upon, but I would say that the reverse is true at the dojo at which I am practicing now.